Sand mold jacket



Oct. 30, 1962 e. JONES ETAL 3,060,532

SAND MOLD JACKET Filed Aug. 10, 1959 2 Sheets-Sheet 1 Y 1962 e. JONES ETAL SAND MOLD JACKET Filed Aug. 10, 1959 2 Sheets-Sheet 2 INVENTORS United States Patent Q 3,060,532 SAND MOLD JACKET Gibb Jones and Tony Cacioppo, both of 1000 1st Ave. N., Birmingham 4, Ala. Filed Aug. 10, 1959, Ser. No. 832,787 2 Claims. (Cl. 2Z112) This invention relates to a sand mold jacket. It has for its main objects to provide such a jacket that will be high- 1y satisfactory for the purpose intended, simple in structure, comparatively cheap to manufacture, easy to keep in serviceable condition, and extremely durable.

The principal object of the jacket is to securely bind sand molds for pouring metals in the foundry industry. Sand molds are made in two sections, top and bottom, designated in foundry terms as cope and drag. Maladjustment of flasks caused by wear, mismatch due to wear and/or adjustment of guides cause outside surface of mold to be irregular. As conventional type jackets of solid construction are applied to molds, they tend to reform the sand, causing distortion to impressions formed by patterns inside cavity of mold, resulting in an imperfect casting. Maintaining perfect condition of flasks and conventional type jackets would be impractical as the cost would be prohibitive. The present jacket is designed to compensate for and not correct faults of the flask. The combination of taper angles of sides of molds, inside surface of bottom of ribs of the present jacket provides a shearing efiect when applied, making contact between outside surface of mold and inside surface of ribs of jacket with a minimum of distortion to sand, resulting in castings more true to patterns.

Other objects and advantages are to provide less runouts, have pattern layout closer to flask, more vent for gas through open construction, much stronger at about half the weight due to metal used in casting of 80-60-3 ductile iron.

Other objects and advantages will appear from the drawings and specification.

By referring generally to the drawings it will be observed that FIG. 1 is an isometric view of a sand mold jacket made according to this invention; FIG. 2 is a vertioal side view of the jacket; FIG. 3 is a sectional view on line 33 of FIG. 2; FIG. 4 is a sectional view on line 4--4 of FIG. 1; and FIG. 5 is an enlarged detail view showing how the corners of the jacket are bolted together.

Similar reference numerals refer to similar parts throughout the several views.

Referring to the drawings in detail it will be seen that the jacket comprises four main parts with each having a plurality of ribs 1, 2, 3, 4, 5 and 6 integral with ends 7, 8, 9, 10, 11, 12. held together by bolt means 13 Integral with two main parts are handles 14 and 15 provided with adjustable bolts 16 and 17 as gage means as to height, said bolts being screwed downward to make contact with a fixed part or temporary block as a base. The main feature of the structure is the shape of the inner faces of the ribs as plainly shown in FIGS. 3 and 4, which show each rib having a slight angle 18 with the lower edge 19 extending means for removing any excess amount of sand when the jacket is placed on a finished sand mold ready "ice for pouring metal therein. By this angle structure the jacket makes a perfect fit between the lower and upper part of the sand mold.

From the foregoing it will appear that the jacket is adapted for use in holding sand molds in perfect position for pouring metal therein.

The jacket may be made of any material suitable for the purpose, but We prefer to use ductile iron. Also the jacket may be made in difierent sizes and capacities depending on how and Where to be used.

While we have shown and described the preferred embodiment of our invention, we do not wish to limit same to the exact and precise details of structure, and we reserve the right to make all modifications and changes so long as they remain within the scope of the invention and the following claims.

Having described our invention, we claim:

1. A sand mold jacket comprising an approximately oblong structure, said structure having four enclosures, each of said enclosures being made of metal and formed with a plurality of ribs integral with end portions, said ribs extending horizontally, bolts and nuts holding said end portions together, each of said four enclosures being positioned slanting as a whole outward from top to bottom, each of said ribs being formed with its inner face slanting slightly outward toward its bottom with its bottom edge extended outward compared with the vertical plane of the enclosure sufliciently to scrape the outer face of a sand mold when the jacket is placed around the mold; two plates as handles, said plates being attached integrally on the top rib of two opposite enclosures, a bolt and adjusting nuts mounted in each of said handles, said bolts and nuts being adapted for use as gages to determine the height of the enclosures by making contact with a base.

2. A sand mold jacket comprising an approximately square structure, said structure having four enclosures, each of said enclosures being made of metal and formed with a plurality of ribs integral with end portions, said ribs extending horizontally, bolts and nuts holding said end portions together, each of said four enclosures being positioned slanting outward from top to 'bottom, each of said ribs being formed with its inner face slanting as a whole slightly outward toward its bottom with its bot tom edge extended outward compared with the vertical plane of the enclosure sufficiently to scrape the outer face of a sand mold when the jacket is placed around the mold; two plates as handles, said plates being attached integrally on the top rib of two opposite enclosures, a bolt and adjusting nuts mounted in each of said handles, said bolts and nuts being adapted for use as gages to determine the height of the enclosures by making contact with a base.

References Cited in the file of this patent UNITED STATES PATENTS 618,080 F-arwell Ian. M, 1899 981,723 Voight Jan. 17, 1911 1,193,104 Wood Aug. 1, 1916 FOREIGN PATENTS 15,101 Great Britain 1913 

